Mondelez Decision

Keep calm and carry on accruing paid personal leave based on ordinary fortnightly hours…

Employers can breathe a heavy sigh of relief!

The High Court has, this morning, handed down its much anticipated decision in the Mondelez v AMWU & Ors case.

By a majority (4:1), the Court has overturned last year’s Full Federal Court majority decision which found that section 96 of the Fair Work Act 2009 (Cth) entitles all employees (except casuals), regardless of their weekly hours of work, to 10 days of paid personal leave per year, with a “day” being the portion of a calendar day that would be allotted to working. The High Court majority found that such an interpretation “would give rise to absurd results and inequitable outcomes, and would be contrary to the legislative purposes of fairness and flexibility in the Fair Work Act”.

Today’s decision confirms that a ‘day’ is a notional day consisting of one-tenth of the equivalent of an employee’s ordinary hours of work in a two-week period” for the purposes of accruing and taking paid personal leave under the Act.

Key Arguments

The key arguments advanced by Mondelez in support of its ‘average day’ construction of the word ‘day’ were that:

  • It means that the leave entitlement is effectively converted into hours based on an employee’s ordinary hours of work over a week, regardless of how those hours are distributed throughout the week. For example, an employee who works 36 hours per week will have worked, across a standard five-day working week, 7.2 hours per day on average. Over the course of the year, that employee will accrue 72 hours personal leave, irrespective of the number of days over which that employee’s hours are worked.
  • It ensures that leave accrual for part time employees achieves the expected results. For example, a part time worker who works half the weekly hours worked by a full time colleague accrues half the amount of personal leave that the full time employee accrues.
  • Interpreting a ‘day’ based on a ‘calendar day’ or ‘24-hour period’ (as the Full Federal Court majority did), produces varied results as to the accrual of personal leave. For example, an employee who works 36 ordinary hours per week at 7.2 hours per day would accrue 72 hours of personal leave per year. Comparatively, if the 36 hours were compressed into 3 x 12-hour shifts, that employee would be entitled to 120 hours of personal leave per year.
  • For employees who work different hours on different days, their ‘day’ will vary depending on the day that the leave is taken.

Ultimately, the High Court majority accepted these arguments and rejected the working day construction, finding that such a construction would lead to inequalities amongst employees with different work patterns, resulting in unfair outcomes.

In particular the majority noted that an employee whose hours are spread over fewer days but with longer shifts would accrue more paid personal leave than an employee working the same number of hours throughout the week, with shorter shifts, spread over more days.

The majority also noted that the “working day” construction would discourage employers from employing anyone other than on a five-day working week basis, which would not be consistent with assisting employees to balance their work and family responsibilities.


As envisaged in our ‘Looking Ahead – 2020 Insight’ published earlier this year, the High Court has provided employers with certainty as to how paid personal leave is accrued and taken under the Act.

As the decision aligns with the approach that has been adopted by the vast majority of employers since the introduction of the Act, it avoids the prospect of large scale underpayment claims being made by employees seeking to recoup additional payments for personal leave taken in recent years.

Dominic Fleeton
+61 3 9958 9616
[email protected]

Shivani Gosai
+61 2 9169 8417
[email protected]